Inspection Procedure 1

Inspection Procedure 1: Abnormal noise from AYC differential (torque transfer mechanism) during cornering

COMMENTS ON TROUBLE SYMPTOM

If the abnormal noise form AYC differential is heard during corning under the system operation, AYC differential may have a problem.

PROBABLE CAUSES

- AYC differential gear oil failure (low oil level, oil contamination)
- Malfunction of AYC differential

DIAGNOSTIC PROCEDURE

STEP 1. AYC differential gear oil level check

Check the AYC differential torque transfer mechanism for gear oil level and oil contamination. (Refer to Gear Oil Level Check.)

Q. Is the check result normal?

YES Go to Step 2.

NO Fill the specified gear oil up to the gear oil level for the torque transfer mechanism, and replace if the contamination is severe. (Refer to Gear Oil Change.) Then, go to Step 3.

STEP 2. Check of AYC reoperation

Using the scan tool, check the AYC operation under forced activation. (Refer to Active Yaw Control (AYC) Operation Check.)

Q. Does a malfunction take place again?

YES Replace the AYC differential. (Refer to Removal and Replacement.) Then, go to Step 3.

NO This diagnosis is complete.

STEP 3. Check of AYC reoperation

Using the scan tool, check the AYC operation under forced activation. (Refer to Active Yaw Control (AYC) Operation Check.)

Q. Does a malfunction take place again?

YES Diagnose again from Step 1.

NO This diagnosis is complete.